old blues

I've been looking for some old school blues. I know of son house but was wondering if anyone could tell me some others. I've been wanting to play some really old blues lately and cannot satisfy the craving. Thanks

yeah the real old stuff. just listened to robert johson on youtube. very cool.... ive been wanting to learn some songs like that.. also i was looking for a forum with some of these types of blues scales on them. so far im getting no where. never learned a scale. thanks for mentioning RJ.